Code cleanup (#1461)
* Code cleanup * Fix flux tests * Fix checkstyle errors * Fix compile error
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@ -28,8 +28,8 @@ package com.iluwatar.interpreter;
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*/
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public class MinusExpression extends Expression {
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private Expression leftExpression;
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private Expression rightExpression;
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private final Expression leftExpression;
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private final Expression rightExpression;
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public MinusExpression(Expression leftExpression, Expression rightExpression) {
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this.leftExpression = leftExpression;
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@ -28,8 +28,8 @@ package com.iluwatar.interpreter;
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*/
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public class MultiplyExpression extends Expression {
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private Expression leftExpression;
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private Expression rightExpression;
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private final Expression leftExpression;
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private final Expression rightExpression;
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public MultiplyExpression(Expression leftExpression, Expression rightExpression) {
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this.leftExpression = leftExpression;
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@ -28,7 +28,7 @@ package com.iluwatar.interpreter;
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*/
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public class NumberExpression extends Expression {
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private int number;
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private final int number;
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public NumberExpression(int number) {
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this.number = number;
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@ -28,8 +28,8 @@ package com.iluwatar.interpreter;
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*/
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public class PlusExpression extends Expression {
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private Expression leftExpression;
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private Expression rightExpression;
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private final Expression leftExpression;
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private final Expression rightExpression;
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public PlusExpression(Expression leftExpression, Expression rightExpression) {
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this.leftExpression = leftExpression;
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